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参数资料
| 型号： | LX2173CP |
| 厂商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.8 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PSFM5 |
| 封装： | PLASTIC, TO-220, 5 PIN |
| 文件页数： | 3/6页 |
| 文件大小： | 254K |
| 代理商： | LX2173CP |
1.25A HIGH-EFFICIENCY 100KHZ SWITCHING REGULATOR
LX2172/73
PRODUCT DA T ABOOK 1996/1997
3
Copyright 1998
Rev. 0.4
a 12/04
P RELIMINAR Y D AT A S HEET
ELECTRICAL CHARACTERISTICS
Reference Section
Parameter
Symbol
Test Conditions
Initial Accuracy
V
REF
T
J = 25C, Measured at FB pin
Over Temperature, Measured at FB pin
Line Regulation
3V < V
CC < 25V
Units
LX2172 / 2173
Min.
Typ.
Max.
1.224
1.244
1.264
V
1.214
1.244
1.274
V
0.03
% / V
Error Amplifier Section
Input Bias Current
I
B
T
J = 25C; VFB = VREF
Over Temperature
Open Loop Gain
A
VOL
Transconductance
g
m
T
J = 25C; VFB = V REF; I = ±25A
Over Temperature
Output Sink Current
I
EA (SINK)
Output Source Current
I
EA (SOURCE)
Output HI Voltage
V
COMP-HI
V
FB = 1V
Output LO Voltage
V
COMP-LO
V
FB = 1.5V
Slew Rate
S
350
750
nA
1100
nA
500
1000
V / V
3000
4400
6000
MHO
2400
7000
MHO
120
200
A
120
A
1.8
2.1
2.3
V
0.2
0.3
0.52
V
2
V/sec
(Unless otherwise specified, these specifications apply over the ranges T
A = 0 to 70C for the LX217xC.
V
IN = VC = 5V.
All devices must be functional over
junction temperature of -65°C to 150°C. Typ. number represents T
A = 25C value.)
Input Supply Section
Start-Up Threshold
Normal Mode Quiescent Current
I
Q
ENABLE = HI, V
C = 0.6V, IO = 0A
V
C Shutdown Threshold
3V < V
IN < VMAX , TJ = 25°C
3V < V
IN < VMAX , Over Temperature
Sleep Mode Current
ENABLE = HI, V
C = 50mV
ENABLE = LO (LX2173 only)
2.2
2.7
2.9
V
58
mA
100
150
260
mV
50
300
mV
100
A
5A
Oscillator Section
Switching Frequency
f
T
A = 25C
Over Temperature
Line Voltage Stability
V
IN = 3V to 25V
90
100
110
kHz
85
100
115
kHz
±5
%
Output Switch Breakdown Voltage
I
SW = 1.5mA
Output Switch On Resistance
R
ON
I
O = 2A
Switch Current Limit
I
LIM
D.C = 50%
50% < D.C < 80%
Total Switching Loss (On Time + Off Time)
V
IN = 25V, D.C = 50%, IO = 1A, VSW = 60V
0.6
1.2
1.25
V
36
40
%
80
90
98
%
E.A. Output to PWM Drive Offset (VPWM)
V
OFS
Duty Cycle = 0
Minimum Duty Cycle
Maximum Duty Cycle
65
V
0.4
0.6
1.25
1.7
2.8
A
1.0
1.5
2.0
A
100
mW
PWM Section
Output Drive Section
100
ns
2A / V
C.S. Delay to Driver Output
10% Over drive GBNT
V
C to Output Transconductance
C.S. Comparator Section
O
B
SO
LETE
PRO
D
UCT
NOT
RECOMMENDED
FOR
NEW
DESIGNS
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